Crank your engine and turn the AC on high cool, high fan. If your recharging hose is equipped with a pressure gauge, check it to determine if the system needs refrigerant. If the pressure holds steady in the recommended range, the system is full and should not be charged.
The driving distance between Dallas, TX and McKinney, TX is 32 miles. The driving time would be approximately 35 minutes if driving non-stop in good conditions. (The driving time does not take into consideration conditions such as weather, road work and rush hour traffic in urban areas.).
Mckinney is part of Collin County. Mckinney has 62.21 square miles of land area and 0.67 square miles of water area. As of 2010, the total Mckinney population is 131,117, which has grown 141.16% since 2000. The population growth rate is much higher than the state average rate of 20.59% and is much higher than the national average rate of 9.71%.